Arthur jensen proposed that there are limits to increases in the improvement of iq scores for people of different a. religions b. genders c. racial groups d. age groups

c. Racial groups. Arthur Jensen proposed that IQ tests do not bear any intrinsic cultural biases that are more inclined to favor one racial or cultural group over another and are therefore accurate depictions of both scholastic and intellectual capacity. He received much criticism for this assertion, however, based on his claims that although Level 1 abilities (memory, simpler learning tasks, etc.) are present equally among all racial groups, the Level 2 abilities (higher thought, abstraction, etc.) present themselves more strongly in white and Asian students and will therefore exhibit comparative advantages in fields requiring more of the latter level of thinking.

Deserets and steppes

Explanation:

characterized by dry climates. These are arid and semiarid areas that have three main characteristics: very low precipitation, high evaporation rates that typically exceed precipitation and wide temperature swings both daily and seasonally.